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  • 10 Units in Stock



This is a simple-to-use Carbon Monoxide (CO) sensor, suitable for sensing CO concentrations in the air. The MQ-7 can detect CO-gas concentrations anywhere from 20 to 2000ppm.

This sensor has a high sensitivity and fast response time. The sensor’s output is an analog resistance. The drive circuit is very simple; all you need to do is power the heater coil with 5V, add a load resistance, and connect the output to an ADC.

This sensor comes in a package similar to our MQ-3 alcohol sensor, and can be used with the breakout board below.

Features :

§  Mainly used for CO collection detection in family, factory, underground operation.

§  Detection Zone:10 to 1000ppmm.

§  Characteristic Gas:100ppmm co.

§  Sensitive Resistance:2K to 20K in 100ppm co.

§  Sensitivity:>=3%.

§  Response Time:<=1s.

§  Recovery Time:<=30s.

§  Heating Resistance:31±3.

§  Heating Current:<=180mA.

§  Heating Voltage:5.0V±0.2V /1.5±0.1V.

§  Heating Power: about 350mW.

§  Conditions:Ambient Temperature:-20C~+50C.

§  Humidity:<=95%RH.

§  Oxygen Content:21% .

§  Size: 3.5cm X 2.2cm - 1.4inch x 0.9inch.

§  It has good sensitivity to carbon monoxide in wide range

§   advantages such as long lifespan, low cost and simple drive circuit &etc.

§  Good sensitivity to Combustible gas in wide range 

§   High sensitivity to Natural gas

§   Long life and low cost

§   Simple drive circuit


  • It is widely used in domestic CO gas leakage alarm
  •  industrial CO gas alarm and portable CO gas detector
  •  Domestic gas leakage detector
  •  Industrial CO detector
  •  Portable gas detector